Tone Loc

iTrader: (1)

I've managed to get some water spray goodies (thanks Rich ) to fit to a MY93 WRX. I'll have the pump, bottle nozzles etc. How do the cars that have this as standard control when it operates? I know they come with 'auto' and 'manual' switches but how does the auto work? Is it just a simple boost switch, or more complex than that. If it is more complex does it have a control unit? And can you get hold of this control?

Sorry if this has been done to death but i just can't seem to get anywhere with the search at the mo.

Tony.

Jaay

I too have a similar question, Ive got the manual switch but would like to do the necessary work to get it auto ??

Any pointers ??

Bob Rawle

There was no "auto" on the early cars, to make it so just use a pressure switch connected across the manual switch terminals, set at the required boost and voila.

jonny gav

iTrader: (1)

i have used an auto switch set at 0.8 bar,i also have an arming switch inside the car.

the switch is a dawes item that i got from JWRacing for around £25

Tone Loc

iTrader: (1)

Ok, so basically the auto is just controlled by boost. No fancy control that monitors throttle position, intake temperature etc.? Do the later cars have a more sofisticated system or are they the same?

Cheers,

Tony.

Ken Ross

I have a simple circuit using an LM747 to switch it on at a set boost. Just fits across the switch on the dash. All I need is an auto switch to finish it off.